... own refining, so price is best 2.we are an experienced and professional producer from 2005 3.OEM 1. Different shape ... ,25 gram,30 gram,ect...according to you request;6. Easy to cleaning after you used,and the waste is easy to ... round,nubby,square,rectangle,oval,and other base on you need; If you are interested in our products,please feel free to contact ...